Answer:
a) 91% of the scores were at or below her score.
b) 9% of the scores were above her score.
Step-by-step explanation:
When a value V is said to be in the xth percentile of a set, x% of the values in the set are lower than V and (100-x)% of the values in the set are higher than V.
In this problem, we have that:
Angela scored on the 91st percentile.
(a) What percentage of the scores were at or below her score?
Since Angela scored on the 91st percentile, 91% of the scores were at or below her score.
(b) What percentage were above?
Since Angela scored on the 91st percentile, 9% of the scores were above her score.
Write a literal equation for a.
18/a=7
Multiply both sides by a
18=7a
Then divide both sides by 7
18/7=a
Final answer: B
Answer:
x = 7.7
Option B
Step-by-step explanation:
∴ value of x is 7.7
